JP3373703B2 - Demolding method of cement building materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for demolding a cement building material which automatically demolds a cement building material cured in an elastically deformable mold.

[0002]

2. Description of the Related Art Conventionally, cement building materials such as decorative wall materials made of concrete or mortar are injected with a kneading cement molding material having a predetermined composition in a molding die to be cured and cured, and then demolded for natural curing. A general method is to obtain a product through the process. In such a molding method, the more complicated the concavo-convex pattern on the surface of the cement building material, the more difficult it is for the cement building material to come off from the molding die during demolding. For this reason, cement building materials with complicated uneven patterns are molded using a mold made of soft synthetic resin such as urethane rubber, and can be demolded while elastically deforming the mold when demolding. .

[0003]

In the above-mentioned method for manufacturing cement building material, the casting process of injecting the kneading cement molding material into the molding die is automated, but the hardened cement building material is taken out from the molding die. The demolding process is performed manually by an operator, and there are drawbacks that the demolding efficiency is low and mass production is difficult.

The present invention has been made in view of the above circumstances, and therefore an object thereof is to improve the production efficiency by automating the demolding process for taking out cement building materials while deforming the molding die. It is to provide a demolding method for building materials.

[0005]

In order to achieve the above object, the method for demolding a cement building material according to claim 1 of the present invention comprises:
A method for automatically demolding a cement building material cured in an elastically deformable molding die, comprising forming fitting recesses in cavity sidewalls of two or four sides of the molding die facing each other, After the cement building material is hardened in the mold, the forming mold is turned upside down by a reversing device, and the extension hooks are inserted from below into the fitting recesses of the cavity side walls of the two opposite sides, and between the extension hooks on both sides. While expanding and deforming the side wall of the cavity by widening the space between the two, the back surface of the mold is pressed by a pressing device from above to be curved, thereby dropping the cement building material in the mold. This allows
The demolding process can be automated.

In this case, as in claim 2, a reinforcing material may be arranged around the fitting concave portion on the side wall of the cavity. With this configuration, even if the work of inserting the expansion hook into the fitting recess of the cavity side wall and expanding and deforming the cavity side wall is repeated many times, damage around the fitting recess of the cavity side wall is prevented by the reinforcing material. It is prevented and the mold can be used for a long time.

Further, in the third aspect, the fitting recess of the side wall of the cavity is formed over substantially the entire length of the side wall of the cavity, and the extension hook is formed wide correspondingly. As a result, the entire side wall of the cavity can be expanded and deformed by the expansion hook, which facilitates demolding.

According to a fourth aspect of the present invention, before the mold is turned upside down, the lid covering the upper surface of the mold is vibrated by a vibrating device, and the lid is hardened from the cement building material. After peeling, the lid is sucked by a suction device and removed from the mold. Thereby, the removal of the lid is also automated.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIG. First, the structure of the molding die 11 will be described with reference to FIG. The molding die 11 is formed of, for example, a silicone-based or urethane-based soft synthetic resin / synthetic rubber. In the mold 11, the intermediate wall 12
Two cavities 13 partitioned by are formed.
Each of the cavities 13 has a rectangular shape with long right and left sides and short front and rear sides, and a concave-convex pattern is formed on the bottom surface.

Further, among the four side cavity side walls 14a and 14b of the molding die 11, correction grooves 15 are formed on the left and right side cavity side walls 14a on which the curved deformation due to linear contraction over time poses a problem. Has been done. Each correction groove 1
5 extends in parallel along the inner wall surface of the cavity side wall 14a, and the total length y of each correction groove 15 is set to be the same as the inner wall surface dimension x of the cavity 13. Further, the thickness dimension of each correction groove 15 is set to be larger than the amount of time-dependent inward bending deformation of the outer side wall portion 16 thereof.

Further, on the front and rear cavities side walls 14b of the molding die 11, there are formed mold-removing recesses 17 which also serve as correction grooves for preventing the bending deformation. This fitting recess 17 is also
Is formed over almost the entire length of the cavity side wall 14b,
Around the fitting recess 17, a reinforcing material 18 formed of a hard resin plate, a metal plate, a wood plate, or the like is insert-molded. Further, on the lower surface of the bottom surface of the molding die 11, a large number of recessed grooves 19 for facilitating elastic deformation of the molding die 11 at the time of demolding are provided in a row, and the lower surface of the bottom surface portion is formed in a corrugated shape.

On the other hand, the upper surface of the molding die 11 is covered with a lid 20 shown in FIG. The material of the lid 20 is not particularly limited, and for example, synthetic resin, wood, metal,
Any material such as FRP may be used. The lid 20 has a flat upper surface, and a fitting convex portion 21 that fits into the correction groove 15 is formed on the lower surface. Further, on the lower surface of the lid 20, two bulging portions 22 bulging into the respective cavities 13 are formed, and the bulging portions 22 are the back surface (top surface in FIG. 5) of the cement building material 24 which is a cement molded product. ) Is used as a mold for forming a concave shape, and the upper end of the intermediate wall 12 is fitted and fixed in the concave portion 23 between the two bulging portions 22.

A vibrating device 25 shown in FIG. 5 (b) is a device for peeling the lid 20 from the hardened cement building material 24, and applies a vibration to the vibrating body 26 and the vibrating body 26. It is composed of a vibration source 27.

On the other hand, the suction device 28 shown in FIGS. 5 (c) and 5 (d) is a device for sucking the lid 20 and removing it from the mold 11, and is connected to an air suction device (not shown) via a hose 29. And a lifting device (not shown) for moving the suction box 30 up and down via the support arm 31.

The reversing device 32 shown in FIG. 6 (a) is a device for reversing the forming die 11 upside down, and is a U-shaped frame 4 for accommodating the forming die 11 conveyed by the roller conveyor 33.
And a motor 35 for rotating the U-shaped frame 34 by 180 °.

Next, the molding die 11 will be described with reference to FIGS. 1 and 2.
An apparatus for dropping cement building material 24 from is described. The roller conveyor 36 that conveys the molding die 11 inverted downward is divided into two so as to support only the cavity side wall 14b of the molding die 11, and a gap for dropping the cement building material 24 between the roller conveyors 36 on both sides. A receiving conveyor belt 37 for receiving the cement building material 24 falling from the molding die 11 is provided below the opening through a roller 38.

Mold 11 placed on roller conveyor 36
An air lifter 39 that is operated by air pressure is provided below both side walls 14b of the cavity, and a die expansion cylinder 40 is provided on the air lifter 39, and an extension hook 41 is attached to a rod of the die expansion cylinder 40. ing. The extension hook 41 is formed wide corresponding to the elongated fitting recess 17.

On the other hand, above the molding die 11, the molding die 11
A pressing device 42 that presses and bends the back surface of the device from above is arranged. The pressing device 42 includes a plurality of air cylinders 43 arranged downward and a pressing body 44 attached to the rod of each air cylinder 43. The stroke of the rod of each air cylinder 43 (the amount of vertical movement of the pressing body 44) and its operation timing can be arbitrarily adjusted by a control panel (not shown).

Next, the procedure for demolding the cement building material 24 hardened in the molding die 11 will be described. The cement building material 24 that has hardened in the molding die 11 is conveyed to the vibration position by the roller conveyor 33 with the lid 20 covered, as shown in FIG. At this vibration position, as shown in FIG.
As shown in FIG. 2, the vibrating body 26 of the vibrating device 25 descends and is directed to the lid 20, and the vibration generated by the vibration source 27 causes the vibrating body 2 to vibrate.
It is transmitted to the lid 20 via 6. Due to this vibration, the lid 2
The bonding state between the lower surface of 0 and the hardened cement building material 24 is peeled off. At this time, the cement building material 24 and the molding die 11
The joined state with the inner surface is also in a state where it is easily peeled off by vibration.

After that, the mold 11 is conveyed to the lid removing position shown in FIG. 5 (c). At this lid removal position, the suction box 30 of the suction device 28 is lowered and the lid 20 is removed.
The lid 20 is attracted to the lower surface of the suction box 30 by the air suction force. In this adsorption state, FIG.
As shown in FIG. 5, the suction box 30 rises, and the lid 20 is removed from the upper surface of the molding die 11. The removed lid 20 is brushed, and after the release agent is applied,
Returned to the starting line.

On the other hand, the molding die 11 with the lid 20 removed
Is conveyed to the inversion position shown in FIG.
1 is set in the U-shaped frame 34. After that, the motor 35 is started and the U-shaped frame 34 is moved to the molding die 11
And the molding die 11 is turned upside down.

Thereafter, the molding die 11 is conveyed to the demolding position shown in FIG. 6 (b), and as shown in FIG. 1, the expansion hook 41 is located directly below the fitting recess 17 of the cavity side wall 14b. become. Then, the air lifters 39 on both sides are extended upward and the extension hooks 41 on both sides are inserted into the fitting recesses 17 of the cavity side walls 14b on both sides. In this state,
As shown in FIG. 2, the die expansion cylinders 40 on both sides are actuated to widen the space between the extension hooks 41 on both sides to expand and deform the cavity side wall 14b, while pressing the back surface of the molding die 11 from above. The cement building material 2 in the molding die 11 is pressed by the pressing body 44 of 42 to be curved.
Drop 4

The cement building material 24 thus falling from the molding die 11 is received by the receiving conveyor belt 37 and conveyed to the finishing process. On the other hand, the mold 11 after demolding is turned upside down, coated with a release agent, and then returned to the start line.

In the embodiment described above, the molding die 11 is turned upside down by the reversing device 32, and the extension hooks 41 are inserted from below into the fitting recesses 17 of the cavity side walls 14b on the two opposite sides, and the extension hooks on both sides are inserted. While expanding the cavity side wall 14b by widening the space between 41, the back surface of the molding die 11 is pressed from above by a pressing device 42 to be curved, so that the cement building material 24 in the molding die 11 is deformed. Since it is made to fall, it is possible to automate the demolding process which was conventionally performed manually.

In the above embodiment, the uneven pattern is formed only on the bottom surface of the molding die 11, but the uneven pattern may be formed on the inner surface of the cavity side wall 14b which is expanded and deformed by the expansion hook 41. good. Even in this case, the cavity side wall 14b can be expanded and deformed by the expansion hook 41 to enable automatic mold release.

Further, in the above embodiment, since the reinforcing material 18 is arranged around the fitting recess 17 of the cavity side wall 14b, the expansion hook 41 is inserted into the fitting recess 17 of the cavity side wall 14b and the cavity side wall 14b. Even if the work of expanding and deforming the cavity is repeated many times, the cavity sidewall 14
The damage around the fitting recess 17 of b can be prevented by the reinforcing material 18, the molding die 11 can be used for a long time, and the die cost can be reduced.

However, according to the present invention, as shown in FIG. 7, the fitting recess 17 of the cavity side wall 14b may not be provided with a reinforcing material, and even in this case, the intended purpose of the present invention is sufficiently achieved. it can.

In the above embodiment, the fitting recess 17 of the cavity side wall 14b is formed over substantially the entire length of the cavity side wall 14b, and the expansion hook 4 is correspondingly formed.
Since 1 is also formed wide, the entire cavity sidewall 14b can be expanded and deformed by the extension hook 41, and the entire surface of the cavity sidewall 14b can be cement-constructed material 2
It can be reliably peeled off from No. 4, and the mold can be easily removed.

However, the present invention is not limited to the structure in which the fitting recess 17 is formed over substantially the entire length of the cavity side wall 14b, and for example, the fitting recess is intermittently formed at a plurality of locations on the cavity side wall 14b. The cavity side wall 14b may be expanded and deformed by inserting an expansion hook into the fitting concave portion.

In the above embodiment, before the mold 11 is turned upside down, the cover 20 covering the upper surface of the mold 11 is vibrated by the vibrating device 25 to cure the cover 20. The lid 20 can be peeled off from the cement building material 24, and then the lid 20 can be sucked by the suction device 28 and removed from the molding die 11, whereby the step of removing the lid 20 can be automated.

By the way, the mold 11 made of soft synthetic resin / synthetic rubber has a property of linearly contracting with time. However, in the above-described embodiment, as shown in FIG. Since the correction groove 15 is formed in each of the cavity side walls 14a and the total length y of the correction groove 15 is set to be the same as the inner wall surface dimension x of the cavity 13, even if linear shrinkage occurs in the cavity side wall 14a, correction is performed. In the side wall portion 45 inside the region where the groove 15 is formed, the contraction amounts of both the inner wall surface and the outer wall surface are equal, and the contraction stress generated on the inner wall surface side and the contraction stress generated on the outer wall surface side are balanced. The time-dependent curving deformation of the inner wall surface can be suppressed. However, the present invention does not necessarily need to form the correction groove 15, and even if the correction groove 15 is not formed, the intended purpose of the present invention can be sufficiently achieved.

In the embodiment described above, the extension hook 4 is used.
Pneumatically actuated die expansion cylinder 4 as drive source
Although 0 is used, it may be operated by a spring force or a magnetic force. Here, the magnetic force may be a permanent magnet or an electromagnetic coil, and the electromagnetic coil may be an electromagnet or a motor incorporated therein.

For example, the expansion hook 41 is utilized by utilizing the spring force.
When driving the, it may be configured as shown in FIG. In the configuration example of FIG. 8, the extension hook 41 is slidably provided on the air lifter 39 via the guide rail 46.
The extension hook 41 is connected to one end of a spring 48 such as a spring spring via a wire 47, and the other end of the spring 48 is fixed to the base 53. The wire 47 for pulling the extension hook 41 is stretched over two fixed pulleys 49, 50 and a movable pulley 51 located in the middle between them. A weight 52 is attached to the movable pulley 51 in the middle, and a movable weight is moved by this weight 52. The pulley 51 is pulled downward to give tension to the wire 47. Further, the vertical slide amount of the movable pulley 51 can be adjusted by an adjusting mechanism (not shown).

In this structure, as the air lifter 39 is extended upward and the expansion hook 41 is inserted into the fitting recess 17 of the cavity side wall 14b, the expansion hook 41 gradually slides to the right in the drawing to move the cavity side wall 14b. Expand and deform.

In the above embodiments, the extension hook 41 is used.
The air lifter 39 that is operated by air pressure as means for raising the pressure and inserting it into the fitting recess 17 of the cavity side wall 14b.
However, instead of this, an elevating mechanism driven by a motor or the like may be used.

[0036]

As is apparent from the above description, according to the demolding method of the first aspect of the present invention, the molding die is turned upside down by the reversing device to form the fitting recesses of the cavity side walls on the two opposite sides. The expansion hooks are inserted from below respectively, and while the space between the expansion hooks on both sides is widened and the cavity side wall is expanded and deformed, the back surface of the mold is pressed by a pressing device from above to be curved, whereby the molding is performed. The cement building material in the mold can be dropped, and the demolding process, which was conventionally done manually, can be automated and the production efficiency can be improved.

Further, in the present invention, since the reinforcing material is arranged around the fitting concave portion of the cavity side wall, the reinforcing material can prevent damage around the fitting concave portion of the cavity side wall due to the insertion of the extension hook, The mold can be used for a long time,
Mold cost can be reduced.

Further, in the third aspect, since the fitting recess of the cavity side wall is formed over substantially the entire length of the cavity side wall and the expansion hook is also formed wide correspondingly, the entire cavity side wall is formed by the expansion hook. By expanding and deforming, the entire side wall of the cavity can be reliably separated from the cement building material, and the mold can be easily removed.

According to a fourth aspect of the present invention, before the mold is turned upside down, the lid covering the upper surface of the mold is vibrated by a vibrating device to remove the lid from the hardened cement building material. Since this is done, the lid can be sucked by the suction device and removed from the mold, and the lid can be removed automatically.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a demolding device showing a state immediately before demolding according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a demolding device showing a demolded state.

3A is a plan view of a molding die, FIG. 3B is B of FIG.
-B sectional view, (c) is CC sectional view of (a)

FIG. 4 is a partially cutaway perspective view of a lid placed on the upper surface of the molding die.

FIG. 5 is a diagram illustrating a process from conveyance of a molding die to removal of a lid.

FIG. 6 is a diagram illustrating a process from inversion of a molding die to conveyance to a demolding position.

7A and 7B show another embodiment of the molding die, wherein FIG. 7A is a plan view of the molding die, FIG. 7B is a sectional view taken along line BB of FIG.
(C) is the CC sectional view of (a).

FIG. 8 is a configuration diagram showing another embodiment of the drive mechanism for the extension hook.

[Explanation of symbols]

11 ... Mold, 13 ... Cavity, 14a, 14b ... Cavity side wall, 15 ... Correction groove, 17 ... Fitting recess, 18 ...
Reinforcement material, 20 ... Lid, 21 ... Fitting convex portion, 24 ... Cement building material, 25 ... Vibrating device, 26 ... Vibrating body, 28 ... Adsorption device, 30 ... Suction box, 32 ... Inversion device, 36
... roller conveyor, 37 ... receiving conveyor belt, 39 ...
Air lifter, 40 ... Type expansion cylinder, 41 ... Expansion hook, 42 ... Pressing device, 43 ... Air cylinder, 44 ... Pressing body, 47 ... Wire, 48 ... Spring, 49, 50 ... Fixed pulley, 51 ... Movable pulley, 52 ... Weight.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B28B 7/10 B28B 13/06 B28B 7/06

Claims (4)

(57) [Claims] 1. A method for demolding a cement building material, wherein a cement building material cured in an elastically deformable molding die is automatically demolded, the cavity being on two or four sides of the molding die facing each other. After forming a fitting recess in the side wall and curing the cement building material in the mold, the mold is turned upside down by a reversing device, and the fitting recesses of the cavity side walls on the two opposite sides are respectively inserted from below. By inserting an expansion hook and expanding the space between the expansion hooks on both sides to expand and deform the side wall of the cavity, the back surface of the mold is pressed by a pressing device from above to be curved, whereby A method for demolding a cement building material, which comprises dropping the cement building material. 2. The method for demolding a cement building material according to claim 1, wherein a reinforcing material is provided around the fitting recess of the side wall of the cavity. 3. The fitting recess of the side wall of the cavity is formed over substantially the entire length of the side wall of the cavity, and the extension hook is formed wide correspondingly. Method for demolding the described cement building material. 4. Before the mold is turned upside down, a lid covering the upper surface of the mold is vibrated by a vibrating device to remove the lid from the hardened cement building material, and then the lid is removed. The method for demolding a cement building material according to any one of claims 1 to 3, wherein the adsorbent is adsorbed by an adsorbing device and removed from the mold.